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Title: Pulverized coal firing of aluminum melting furnaces. Final report. [Sulfide capacity of various slags in given temperature range]

Significant progress has been achieved in the development of a desulfurizing coal combustion process by the Aluminum Company of America (Alcoa) in a research program funded by the United States Department of Energy. Conceptually, high sulfur coal is burned with additives in a staged cyclone combustor, such that sufficient sulfur to obviate products of combustion (POC) scrubbing is retained in the slag by-product. Bench scale studies conducted during the program have shown that 70% of the sulfur (2.65% sulfur coal) reports to the slag at equilibrium through a 25% addition of iron ore to the coal. Results obtained correlate with published data for similar slag at higher temperatures. In pilot scale combustion tests, equilibrium levels of coal sulfur were retained by the slag (11 to 14%). Equilibrium sulfur capture was limited by low particulate retention and operating temperature higher than optimal. Cost estimates for implementation of the process are included in this report. 28 references, 39 figures, 58 tables.
Authors:
; ;
Publication Date:
OSTI Identifier:
6841673
Report Number(s):
DOE/CS/40037-T17
ON: DE84013093
DOE Contract Number:
AC07-78CS40037
Resource Type:
Technical Report
Research Org:
Aluminum Co. of America, Alcoa Center, PA. Alcoa Technical Center
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 20 FOSSIL-FUELED POWER PLANTS; ALUMINIUM; MELTING; COAL; STAGED COMBUSTION; CYCLONE COMBUSTORS; VERY HIGH TEMPERATURE; FLUE GAS; DESULFURIZATION; SLAGS; SOLVENT PROPERTIES; ADDITIVES; BURNERS; ECONOMICS; EXPERIMENTAL DATA; FURNACES; IRON ORES; PARTICULATES; PHASE DIAGRAMS; CARBONACEOUS MATERIALS; CHEMICAL REACTIONS; COMBUSTION; COMBUSTORS; DATA; DIAGRAMS; ELEMENTS; ENERGY SOURCES; FOSSIL FUELS; FUELS; GASEOUS WASTES; INFORMATION; MATERIALS; METALS; NUMERICAL DATA; ORES; OXIDATION; PARTICLES; PHASE TRANSFORMATIONS; THERMOCHEMICAL PROCESSES; WASTES 014000* -- Coal, Lignite, & Peat-- Combustion; 200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions